LG MJ1 3500mAh 18650 Cell – 10A Flat Top INR/NMC Li-ion

The LG MJ1 3500mAh 18650 cell is a high-capacity lithium-ion cell built for e-bike, electric scooter, power tool and UPS battery packs. It delivers a 3500 mAh nominal capacity, a 3.6 V nominal voltage and a 10 A continuous discharge current. The chemistry is Li-ion INR/NMC, and the terminal is flat top.

This is an unprotected cell. It carries no integrated protection board, so it belongs only in packs managed by a BMS (battery management system). The LG MJ1 suits any 3.6 V nominal module wired in series and parallel, following 1S/2S…nS-nP layouts. Builders choose it when energy density and long runtime between charges matter more than raw current.

Because of that focus, the LG MJ1 appears in vehicle and tool battery packs that need many watt-hours in a small space. The 18650 format keeps the cell compatible with standard holders, welding jigs and nickel strip patterns.

Key Benefits

• 3500 mAh capacity – longer runtime between charges inside a single 18650 body.
• INR/NMC chemistry – a balanced ratio between energy density and safety.
• 10 A continuous discharge – enough current for moderate-load e-bike and tool packs.
• 3.6 V nominal voltage – the standard figure used when calculating series stages.
• 18650 format – a cylindrical body of 18.20 mm diameter and 65.00 mm length fits common cell holders.
• Flat top terminal – convenient for spot welding with nickel strips.
• Wide application range – suits both series and parallel wiring inside battery packs.
• Rechargeable cell – intended for reusable e-mobility and UPS modules.

Who Is This Cell For?

The LG MJ1 3500mAh cell is made for battery packs in electric bikes, electric scooters, power tools and UPS systems. Furthermore, it fits other 3.6 V nominal modules that already include a BMS. Each pack must control charging, discharging and cell balance.

This product targets pack manufacturers and technicians who assemble nS-nP configurations themselves. Typical work includes cell replacement jobs, custom-built e-bike batteries and refreshed tool packs. Builders who repack older 18650 modules will find the dimensions and flat top familiar.

Keep in mind that the cell is not a finished product. Therefore it is used together with a BMS board, nickel strips and cell holders. A single cell can also serve as an element inside a power bank, but only with a control and charging module that provides the required protections.

Technical Specifications

Usage Notes

• BMS required – protects against overcharge, excessive current, overvoltage and low voltage.
• Spot welding – join cells with nickel or copper strips and avoid overheating.
• Charging – charge only with suitable Li-ion chargers up to 4.20 V.
• Safety – never use damaged cells and never allow a short circuit.
• Configuration – build 1S/2S…nS-nP according to your project voltage and current targets.

Why Choose the LG MJ1 3500mAh Cell?

The LG MJ1 is a high-capacity cell rather than a high-current one. Consequently, builders pick it when long runtime outweighs peak power. A capacity of 3500 mAh in one element also lets you reduce the number of parallel cells in a pack.

The INR/NMC cathode provides a dependable energy density balance for daily cycling duty. In addition, the flat top terminal and the precise 18.20 × 65.00 mm dimensions match standard 18650 holders and welding templates. That makes planning a pack layout straightforward.

If your project demands more than 10 A of continuous discharge current, choose high-drain cells instead. The LG MJ1 works best where a steady, moderate load runs for a long time.

Frequently Asked Questions

Can I use the LG MJ1 in an e-bike battery pack?

• Yes, it is designed for e-bike, electric scooter, power tool and UPS packs.
• The pack must include a BMS that manages charging and discharging.

Is this cell protected?

• No, this is an unprotected cell with no integrated protection board.
• Protection comes from the BMS board in your pack.

What is the continuous discharge current?

• The continuous discharge current is 10 A.
• For higher current demands, select a high-drain cell instead.

Which devices and modules is the LG MJ1 compatible with?

• It fits electric bikes, electric scooters, power tools and UPS systems.
• It also suits any 3.6 V nominal module equipped with a BMS.

How should I connect these cells?

• Use spot welding with nickel or copper strips.
• Avoid overheating the cell body during welding.

What voltage should I charge it to?

• Charge to a maximum of 4.20 V with a proper Li-ion charger.
• The discharge cut-off voltage is 2.50 V.

Will it fit standard 18650 holders?

• Yes, the body measures 18.20 mm in diameter and 65.00 mm in length.
• The flat top terminal also matches common welding jigs.

Can I use a single cell on its own?

• A single cell can power a small module, such as a power bank element.
• However, it needs a control and charging module that supplies protection.

The LG MJ1 3500mAh 18650 cell gives pack builders a dense energy source in a familiar cylindrical body. Pair it with a BMS board, nickel strips and cell holders, then wire your nS-nP configuration to match the target voltage and current. For long-runtime e-mobility and tool packs, it remains a straightforward and predictable building block.